It's all paved, most of the course is on the roads. Starts in front of the Sausage Haus, loops around the north and east perimiter of the Miller Park parking lots, then heads east on Canal Street, under the 35th Street viaduct and up toward 27th Street. After turning around, it does hit the trail for less than a mile but it's a paved trail that follows the Menomonee River.
It's a course that has frustrated me. I have yet to run under 17 minutes there though I was within a handful of seconds at least twice but I don't think it's all that slow of a course. I think my troubles breaking 17 there are mostly due to the typical August heat, the fact that I'm usually in the middle of hard training and the fact that I haven't yet worked out the best racing strategy for this course and competition.